QWidget* w = new QWidget(this); w->setGeometry(10,20,400,300); QVBoxLayout* layout = new QVBoxLayout(w); layout->setSpacing(0); layout->setContentMargins(0,0,0,0); QPushButton* b = new QPushButton(w); b->setSizePolicy(QSizePolicy::Preferred, Q
使用sklearn解决回归问题 依然是加载数据 import numpy as np import matplotlib.pyplot as plt from sklearn import datasets boston = datasets.load_boston() X = boston.data y = boston.target X = X[y < 50.0] y = y[y < 50.0] 通过shape看X矩阵中的结构 X.shape 然后对数据集进行切分,由于sklearn中的随